Initially the backups ran every night but after a month or 2 they failed all the time.

Did go the route of running chkdsk /whatever/whatever and then came accross a bat (.cmd) called checkall.cmd which takes about a day to run and then the backup will work.

Typically did that yesterday and this morning the WHS Console tells me that I have a successfull backup of my Desktop PC's M: drive (1.5TB Samsung HD154UI) Variable Speed SATA).

Even though the Application message in the Event log at 02:24:22 this morning reads: "Faulting application whsbackup.exe, version 6.0.2423.0, faulting module whsbackup.exe, version 6.0.2423.0, fault address 0x00063604."

So I thought I will re-run the backup for C:, D:, M: again and P: (C+D are 500GB drives while P: is my WD Passport 160GB)

a few % into the backup, it came up with the same message that "Backup failed"